Water pipe



FIG. 1 is a perspective view of a water pipe, showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof with the opposite side being a mirror image thereof; and,

FIG. 4 is a top plan view thereof.

The undisclosed bottom plan view is planar and unornamented. 

The ornamental design for a water pipe, as shown and described. 